Performance Software Calculations

[dgoodhue]

The flow efficient used above for the stock LB4 heads is too high from what I have seen over the years. The intake side is probably closer to 40%. 45% is more accurate for a L35 head.

[Chad #2027]

Seems about right. We all know these aren't exactly 280Hp motors stock, not really. I remember a while ago someone posted up a stock rebuild on an engine dyno on the Facebook group (Cheryl Walker-Taggart I believe), it made similar power to above, but the torque was well into the high 400s. Interesting.

[RealFastV6]

Seems like too much spark timing - or is what this is telling you is the maximum spark timing you can theoretically run versus cylinder pressure?

[SyTyRegistry]

Pics dont work on my end?

[Aeroking]

I put some stock numbers into the software to check the results.